/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 16:54:34,648 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 16:54:34,716 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 16:54:34,719 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 16:54:34,720 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 16:54:34,740 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 16:54:34,741 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 16:54:34,742 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 16:54:34,742 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 16:54:34,746 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 16:54:34,746 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 16:54:34,747 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 16:54:34,747 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 16:54:34,748 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 16:54:34,748 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 16:54:34,748 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 16:54:34,749 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 16:54:34,749 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 16:54:34,749 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 16:54:34,749 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 16:54:34,750 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 16:54:34,750 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 16:54:34,750 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 16:54:34,751 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 16:54:34,751 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 16:54:34,751 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 16:54:34,751 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 16:54:34,752 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 16:54:34,752 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 16:54:34,752 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 16:54:34,753 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 16:54:34,753 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 16:54:34,753 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 16:54:34,754 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 16:54:34,754 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 16:54:34,754 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 16:54:35,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 16:54:35,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 16:54:35,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 16:54:35,075 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 16:54:35,075 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 16:54:35,078 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c [2023-08-24 16:54:36,269 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 16:54:36,480 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 16:54:36,480 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c [2023-08-24 16:54:36,486 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70ea38668/8ea818a1753147afa56f148f94b60a88/FLAGb63f20432 [2023-08-24 16:54:36,497 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70ea38668/8ea818a1753147afa56f148f94b60a88 [2023-08-24 16:54:36,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 16:54:36,500 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 16:54:36,501 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 16:54:36,501 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 16:54:36,503 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 16:54:36,503 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 04:54:36" (1/1) ... [2023-08-24 16:54:36,504 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5394bec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:54:36, skipping insertion in model container [2023-08-24 16:54:36,504 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 04:54:36" (1/1) ... [2023-08-24 16:54:36,523 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 16:54:36,689 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c[2975,2988] [2023-08-24 16:54:36,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 16:54:36,708 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 16:54:36,749 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-5.wvr.c[2975,2988] [2023-08-24 16:54:36,751 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 16:54:36,776 INFO L206 MainTranslator]: Completed translation [2023-08-24 16:54:36,776 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:54:36 WrapperNode [2023-08-24 16:54:36,777 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 16:54:36,777 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 16:54:36,778 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 16:54:36,778 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 16:54:36,786 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:54:36" (1/1) ... [2023-08-24 16:54:36,804 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:54:36" (1/1) ... [2023-08-24 16:54:36,841 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 208 [2023-08-24 16:54:36,841 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 16:54:36,842 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 16:54:36,842 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 16:54:36,842 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 16:54:36,850 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:54:36" (1/1) ... [2023-08-24 16:54:36,850 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:54:36" (1/1) ... [2023-08-24 16:54:36,864 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:54:36" (1/1) ... [2023-08-24 16:54:36,864 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:54:36" (1/1) ... [2023-08-24 16:54:36,874 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:54:36" (1/1) ... [2023-08-24 16:54:36,877 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:54:36" (1/1) ... [2023-08-24 16:54:36,878 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:54:36" (1/1) ... [2023-08-24 16:54:36,880 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:54:36" (1/1) ... [2023-08-24 16:54:36,891 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 16:54:36,892 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 16:54:36,892 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 16:54:36,892 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 16:54:36,893 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:54:36" (1/1) ... [2023-08-24 16:54:36,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 16:54:36,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:54:36,920 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 16:54:36,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 16:54:36,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 16:54:36,957 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 16:54:36,957 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 16:54:36,957 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 16:54:36,957 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 16:54:36,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 16:54:36,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 16:54:36,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 16:54:36,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 16:54:36,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 16:54:36,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 16:54:36,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 16:54:36,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 16:54:36,959 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 16:54:37,072 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 16:54:37,082 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 16:54:37,361 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 16:54:37,370 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 16:54:37,371 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-24 16:54:37,373 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 04:54:37 BoogieIcfgContainer [2023-08-24 16:54:37,373 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 16:54:37,375 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 16:54:37,375 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 16:54:37,377 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 16:54:37,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 04:54:36" (1/3) ... [2023-08-24 16:54:37,378 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6635e364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 04:54:37, skipping insertion in model container [2023-08-24 16:54:37,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:54:36" (2/3) ... [2023-08-24 16:54:37,378 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6635e364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 04:54:37, skipping insertion in model container [2023-08-24 16:54:37,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 04:54:37" (3/3) ... [2023-08-24 16:54:37,380 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-5.wvr.c [2023-08-24 16:54:37,398 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 16:54:37,398 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 16:54:37,398 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 16:54:37,583 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 16:54:37,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 251 transitions, 518 flow [2023-08-24 16:54:37,746 INFO L124 PetriNetUnfolderBase]: 24/249 cut-off events. [2023-08-24 16:54:37,746 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 16:54:37,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 249 events. 24/249 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 480 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2023-08-24 16:54:37,755 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 251 transitions, 518 flow [2023-08-24 16:54:37,768 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 241 transitions, 494 flow [2023-08-24 16:54:37,771 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 16:54:37,782 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 224 places, 241 transitions, 494 flow [2023-08-24 16:54:37,785 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 224 places, 241 transitions, 494 flow [2023-08-24 16:54:37,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 241 transitions, 494 flow [2023-08-24 16:54:37,840 INFO L124 PetriNetUnfolderBase]: 24/241 cut-off events. [2023-08-24 16:54:37,840 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 16:54:37,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 241 events. 24/241 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 460 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2023-08-24 16:54:37,849 INFO L119 LiptonReduction]: Number of co-enabled transitions 6892 [2023-08-24 16:54:57,104 WARN L234 SmtUtils]: Spent 7.63s on a formula simplification. DAG size of input: 203 DAG size of output: 201 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-24 16:55:01,000 INFO L134 LiptonReduction]: Checked pairs total: 6480 [2023-08-24 16:55:01,000 INFO L136 LiptonReduction]: Total number of compositions: 293 [2023-08-24 16:55:01,023 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 16:55:01,028 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9f7d7b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 16:55:01,028 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 16:55:01,038 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 16:55:01,038 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-08-24 16:55:01,038 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 16:55:01,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:55:01,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:55:01,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:55:01,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:55:01,044 INFO L85 PathProgramCache]: Analyzing trace with hash 437361815, now seen corresponding path program 1 times [2023-08-24 16:55:01,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:55:01,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068960659] [2023-08-24 16:55:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:55:01,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:55:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:55:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:55:01,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:55:01,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068960659] [2023-08-24 16:55:01,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068960659] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:55:01,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:55:01,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 16:55:01,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133901342] [2023-08-24 16:55:01,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:55:01,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 16:55:01,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:55:01,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 16:55:01,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 16:55:01,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 544 [2023-08-24 16:55:01,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:01,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:55:01,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 544 [2023-08-24 16:55:01,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:55:01,635 INFO L124 PetriNetUnfolderBase]: 45/80 cut-off events. [2023-08-24 16:55:01,635 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-24 16:55:01,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 80 events. 45/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 187 event pairs, 18 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-08-24 16:55:01,637 INFO L140 encePairwiseOnDemand]: 541/544 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-24 16:55:01,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-08-24 16:55:01,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 16:55:01,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 16:55:01,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 626 transitions. [2023-08-24 16:55:01,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38357843137254904 [2023-08-24 16:55:01,652 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 626 transitions. [2023-08-24 16:55:01,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 626 transitions. [2023-08-24 16:55:01,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:55:01,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 626 transitions. [2023-08-24 16:55:01,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:01,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 544.0) internal successors, (2176), 4 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:01,668 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 544.0) internal successors, (2176), 4 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:01,669 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 626 transitions. [2023-08-24 16:55:01,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-08-24 16:55:01,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 16:55:01,673 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-08-24 16:55:01,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-08-24 16:55:01,677 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-24 16:55:01,677 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-08-24 16:55:01,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:01,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:55:01,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:55:01,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 16:55:01,678 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:55:01,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:55:01,685 INFO L85 PathProgramCache]: Analyzing trace with hash 140349569, now seen corresponding path program 1 times [2023-08-24 16:55:01,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:55:01,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780889790] [2023-08-24 16:55:01,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:55:01,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:55:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:55:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:55:02,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:55:02,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780889790] [2023-08-24 16:55:02,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780889790] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:55:02,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:55:02,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:55:02,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923953221] [2023-08-24 16:55:02,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:55:02,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:55:02,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:55:02,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:55:02,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:55:02,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 544 [2023-08-24 16:55:02,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:02,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:55:02,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 544 [2023-08-24 16:55:02,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:55:02,490 INFO L124 PetriNetUnfolderBase]: 72/135 cut-off events. [2023-08-24 16:55:02,490 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 16:55:02,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 135 events. 72/135 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 368 event pairs, 24 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 274. Up to 77 conditions per place. [2023-08-24 16:55:02,491 INFO L140 encePairwiseOnDemand]: 538/544 looper letters, 35 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-08-24 16:55:02,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 179 flow [2023-08-24 16:55:02,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:55:02,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:55:02,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1005 transitions. [2023-08-24 16:55:02,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3694852941176471 [2023-08-24 16:55:02,495 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1005 transitions. [2023-08-24 16:55:02,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1005 transitions. [2023-08-24 16:55:02,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:55:02,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1005 transitions. [2023-08-24 16:55:02,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:02,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:02,506 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:02,506 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 1005 transitions. [2023-08-24 16:55:02,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 179 flow [2023-08-24 16:55:02,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 175 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 16:55:02,508 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2023-08-24 16:55:02,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-08-24 16:55:02,509 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-08-24 16:55:02,510 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2023-08-24 16:55:02,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:02,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:55:02,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:55:02,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 16:55:02,513 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:55:02,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:55:02,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1260427053, now seen corresponding path program 2 times [2023-08-24 16:55:02,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:55:02,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062331974] [2023-08-24 16:55:02,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:55:02,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:55:02,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:55:02,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:55:02,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:55:02,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062331974] [2023-08-24 16:55:02,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062331974] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:55:02,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:55:02,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:55:02,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070849661] [2023-08-24 16:55:02,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:55:02,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:55:02,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:55:02,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:55:02,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:55:02,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 544 [2023-08-24 16:55:02,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:02,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:55:02,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 544 [2023-08-24 16:55:02,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:55:03,014 INFO L124 PetriNetUnfolderBase]: 111/208 cut-off events. [2023-08-24 16:55:03,014 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2023-08-24 16:55:03,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 602 conditions, 208 events. 111/208 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 648 event pairs, 42 based on Foata normal form. 2/169 useless extension candidates. Maximal degree in co-relation 584. Up to 133 conditions per place. [2023-08-24 16:55:03,016 INFO L140 encePairwiseOnDemand]: 538/544 looper letters, 37 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2023-08-24 16:55:03,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 44 transitions, 252 flow [2023-08-24 16:55:03,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:55:03,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:55:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1001 transitions. [2023-08-24 16:55:03,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36801470588235297 [2023-08-24 16:55:03,019 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1001 transitions. [2023-08-24 16:55:03,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1001 transitions. [2023-08-24 16:55:03,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:55:03,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1001 transitions. [2023-08-24 16:55:03,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.2) internal successors, (1001), 5 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:03,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:03,028 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:03,028 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 5 states and 1001 transitions. [2023-08-24 16:55:03,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 44 transitions, 252 flow [2023-08-24 16:55:03,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 235 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-24 16:55:03,032 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 124 flow [2023-08-24 16:55:03,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-08-24 16:55:03,033 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 11 predicate places. [2023-08-24 16:55:03,033 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 124 flow [2023-08-24 16:55:03,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:03,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:55:03,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:55:03,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 16:55:03,034 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:55:03,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:55:03,035 INFO L85 PathProgramCache]: Analyzing trace with hash -705386557, now seen corresponding path program 3 times [2023-08-24 16:55:03,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:55:03,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193716045] [2023-08-24 16:55:03,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:55:03,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:55:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:55:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:55:03,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:55:03,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193716045] [2023-08-24 16:55:03,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193716045] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:55:03,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:55:03,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:55:03,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917291097] [2023-08-24 16:55:03,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:55:03,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:55:03,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:55:03,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:55:03,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:55:03,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 544 [2023-08-24 16:55:03,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:03,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:55:03,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 544 [2023-08-24 16:55:03,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:55:03,666 INFO L124 PetriNetUnfolderBase]: 121/224 cut-off events. [2023-08-24 16:55:03,666 INFO L125 PetriNetUnfolderBase]: For 303/303 co-relation queries the response was YES. [2023-08-24 16:55:03,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 224 events. 121/224 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 734 event pairs, 44 based on Foata normal form. 4/201 useless extension candidates. Maximal degree in co-relation 764. Up to 121 conditions per place. [2023-08-24 16:55:03,668 INFO L140 encePairwiseOnDemand]: 538/544 looper letters, 37 selfloop transitions, 12 changer transitions 0/49 dead transitions. [2023-08-24 16:55:03,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 49 transitions, 321 flow [2023-08-24 16:55:03,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:55:03,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:55:03,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1006 transitions. [2023-08-24 16:55:03,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3698529411764706 [2023-08-24 16:55:03,672 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1006 transitions. [2023-08-24 16:55:03,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1006 transitions. [2023-08-24 16:55:03,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:55:03,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1006 transitions. [2023-08-24 16:55:03,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.2) internal successors, (1006), 5 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:03,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:03,681 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:03,681 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 124 flow. Second operand 5 states and 1006 transitions. [2023-08-24 16:55:03,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 49 transitions, 321 flow [2023-08-24 16:55:03,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 49 transitions, 297 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-24 16:55:03,684 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 203 flow [2023-08-24 16:55:03,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-08-24 16:55:03,684 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 17 predicate places. [2023-08-24 16:55:03,685 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 203 flow [2023-08-24 16:55:03,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:03,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:55:03,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:55:03,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 16:55:03,686 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:55:03,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:55:03,686 INFO L85 PathProgramCache]: Analyzing trace with hash -265275717, now seen corresponding path program 4 times [2023-08-24 16:55:03,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:55:03,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666952514] [2023-08-24 16:55:03,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:55:03,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:55:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:55:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:55:03,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:55:03,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666952514] [2023-08-24 16:55:03,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666952514] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:55:03,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:55:03,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:55:03,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53147580] [2023-08-24 16:55:03,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:55:03,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:55:03,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:55:03,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:55:03,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:55:03,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 544 [2023-08-24 16:55:03,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:03,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:55:03,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 544 [2023-08-24 16:55:03,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:55:04,119 INFO L124 PetriNetUnfolderBase]: 117/220 cut-off events. [2023-08-24 16:55:04,121 INFO L125 PetriNetUnfolderBase]: For 545/545 co-relation queries the response was YES. [2023-08-24 16:55:04,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 848 conditions, 220 events. 117/220 cut-off events. For 545/545 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 711 event pairs, 50 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 824. Up to 177 conditions per place. [2023-08-24 16:55:04,122 INFO L140 encePairwiseOnDemand]: 538/544 looper letters, 32 selfloop transitions, 15 changer transitions 0/47 dead transitions. [2023-08-24 16:55:04,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 375 flow [2023-08-24 16:55:04,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:55:04,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:55:04,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1000 transitions. [2023-08-24 16:55:04,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36764705882352944 [2023-08-24 16:55:04,126 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1000 transitions. [2023-08-24 16:55:04,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1000 transitions. [2023-08-24 16:55:04,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:55:04,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1000 transitions. [2023-08-24 16:55:04,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.0) internal successors, (1000), 5 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:04,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:04,134 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:04,135 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 203 flow. Second operand 5 states and 1000 transitions. [2023-08-24 16:55:04,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 375 flow [2023-08-24 16:55:04,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 362 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-24 16:55:04,140 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 296 flow [2023-08-24 16:55:04,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-08-24 16:55:04,142 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-08-24 16:55:04,142 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 296 flow [2023-08-24 16:55:04,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:04,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:55:04,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:55:04,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 16:55:04,143 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:55:04,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:55:04,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1433679233, now seen corresponding path program 5 times [2023-08-24 16:55:04,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:55:04,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143503047] [2023-08-24 16:55:04,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:55:04,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:55:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:55:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:55:04,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:55:04,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143503047] [2023-08-24 16:55:04,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143503047] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:55:04,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:55:04,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:55:04,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784012945] [2023-08-24 16:55:04,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:55:04,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:55:04,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:55:04,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:55:04,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:55:04,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 544 [2023-08-24 16:55:04,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:04,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:55:04,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 544 [2023-08-24 16:55:04,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:55:04,546 INFO L124 PetriNetUnfolderBase]: 118/223 cut-off events. [2023-08-24 16:55:04,546 INFO L125 PetriNetUnfolderBase]: For 638/638 co-relation queries the response was YES. [2023-08-24 16:55:04,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 223 events. 118/223 cut-off events. For 638/638 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 736 event pairs, 38 based on Foata normal form. 2/198 useless extension candidates. Maximal degree in co-relation 934. Up to 123 conditions per place. [2023-08-24 16:55:04,548 INFO L140 encePairwiseOnDemand]: 538/544 looper letters, 38 selfloop transitions, 14 changer transitions 0/52 dead transitions. [2023-08-24 16:55:04,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 442 flow [2023-08-24 16:55:04,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:55:04,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:55:04,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1004 transitions. [2023-08-24 16:55:04,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36911764705882355 [2023-08-24 16:55:04,551 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1004 transitions. [2023-08-24 16:55:04,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1004 transitions. [2023-08-24 16:55:04,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:55:04,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1004 transitions. [2023-08-24 16:55:04,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.8) internal successors, (1004), 5 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:04,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:04,560 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:04,560 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 296 flow. Second operand 5 states and 1004 transitions. [2023-08-24 16:55:04,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 442 flow [2023-08-24 16:55:04,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 388 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-08-24 16:55:04,565 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 282 flow [2023-08-24 16:55:04,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2023-08-24 16:55:04,566 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 25 predicate places. [2023-08-24 16:55:04,566 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 282 flow [2023-08-24 16:55:04,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:04,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:55:04,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:55:04,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 16:55:04,567 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:55:04,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:55:04,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1263273043, now seen corresponding path program 6 times [2023-08-24 16:55:04,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:55:04,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536505062] [2023-08-24 16:55:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:55:04,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:55:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:55:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:55:04,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:55:04,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536505062] [2023-08-24 16:55:04,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536505062] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:55:04,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:55:04,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:55:04,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087424754] [2023-08-24 16:55:04,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:55:04,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:55:04,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:55:04,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:55:04,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:55:04,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 544 [2023-08-24 16:55:04,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:04,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:55:04,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 544 [2023-08-24 16:55:04,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:55:04,895 INFO L124 PetriNetUnfolderBase]: 117/216 cut-off events. [2023-08-24 16:55:04,895 INFO L125 PetriNetUnfolderBase]: For 674/674 co-relation queries the response was YES. [2023-08-24 16:55:04,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 897 conditions, 216 events. 117/216 cut-off events. For 674/674 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 675 event pairs, 49 based on Foata normal form. 2/191 useless extension candidates. Maximal degree in co-relation 870. Up to 170 conditions per place. [2023-08-24 16:55:04,897 INFO L140 encePairwiseOnDemand]: 538/544 looper letters, 34 selfloop transitions, 15 changer transitions 0/49 dead transitions. [2023-08-24 16:55:04,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 414 flow [2023-08-24 16:55:04,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:55:04,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:55:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1000 transitions. [2023-08-24 16:55:04,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36764705882352944 [2023-08-24 16:55:04,901 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1000 transitions. [2023-08-24 16:55:04,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1000 transitions. [2023-08-24 16:55:04,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:55:04,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1000 transitions. [2023-08-24 16:55:04,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.0) internal successors, (1000), 5 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:04,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:04,908 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 544.0) internal successors, (3264), 6 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:04,908 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 282 flow. Second operand 5 states and 1000 transitions. [2023-08-24 16:55:04,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 414 flow [2023-08-24 16:55:04,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 380 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-24 16:55:04,911 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 294 flow [2023-08-24 16:55:04,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2023-08-24 16:55:04,912 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 27 predicate places. [2023-08-24 16:55:04,912 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 294 flow [2023-08-24 16:55:04,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.0) internal successors, (980), 5 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:04,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:55:04,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:55:04,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 16:55:04,913 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:55:04,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:55:04,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1054297638, now seen corresponding path program 1 times [2023-08-24 16:55:04,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:55:04,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162097114] [2023-08-24 16:55:04,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:55:04,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:55:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:55:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:55:05,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:55:05,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162097114] [2023-08-24 16:55:05,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162097114] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:55:05,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89531669] [2023-08-24 16:55:05,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:55:05,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:55:05,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:55:05,266 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:55:05,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 16:55:05,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:55:05,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-24 16:55:05,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:55:05,512 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 16:55:05,556 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 16:55:05,603 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 16:55:06,597 INFO L322 Elim1Store]: treesize reduction 294, result has 7.8 percent of original size [2023-08-24 16:55:06,597 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 14 new quantified variables, introduced 36 case distinctions, treesize of input 537 treesize of output 386 [2023-08-24 16:55:10,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:55:10,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:55:32,303 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:55:32,304 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 406 treesize of output 238 [2023-08-24 16:55:32,367 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:55:32,367 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 1246 treesize of output 1134 [2023-08-24 16:55:32,482 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:55:32,482 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 196 treesize of output 234 [2023-08-24 16:55:36,557 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:55:36,557 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 281 treesize of output 229 [2023-08-24 16:55:37,232 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-24 16:55:37,233 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 698 treesize of output 1 [2023-08-24 16:55:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:55:37,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89531669] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:55:37,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:55:37,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-24 16:55:37,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878093912] [2023-08-24 16:55:37,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:55:37,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:55:37,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:55:37,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:55:37,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=237, Unknown=3, NotChecked=0, Total=306 [2023-08-24 16:55:37,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 544 [2023-08-24 16:55:37,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 294 flow. Second operand has 18 states, 18 states have (on average 93.66666666666667) internal successors, (1686), 18 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:37,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:55:37,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 544 [2023-08-24 16:55:37,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:55:45,702 WARN L234 SmtUtils]: Spent 8.23s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:55:55,109 INFO L124 PetriNetUnfolderBase]: 407/745 cut-off events. [2023-08-24 16:55:55,109 INFO L125 PetriNetUnfolderBase]: For 2053/2053 co-relation queries the response was YES. [2023-08-24 16:55:55,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2902 conditions, 745 events. 407/745 cut-off events. For 2053/2053 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3504 event pairs, 26 based on Foata normal form. 9/624 useless extension candidates. Maximal degree in co-relation 2147. Up to 249 conditions per place. [2023-08-24 16:55:55,114 INFO L140 encePairwiseOnDemand]: 533/544 looper letters, 83 selfloop transitions, 41 changer transitions 79/203 dead transitions. [2023-08-24 16:55:55,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 203 transitions, 1581 flow [2023-08-24 16:55:55,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 16:55:55,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 16:55:55,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2266 transitions. [2023-08-24 16:55:55,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.18110613810741688 [2023-08-24 16:55:55,128 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2266 transitions. [2023-08-24 16:55:55,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2266 transitions. [2023-08-24 16:55:55,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:55:55,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2266 transitions. [2023-08-24 16:55:55,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 98.52173913043478) internal successors, (2266), 23 states have internal predecessors, (2266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:55,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 544.0) internal successors, (13056), 24 states have internal predecessors, (13056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:55,152 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 544.0) internal successors, (13056), 24 states have internal predecessors, (13056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:55,152 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 294 flow. Second operand 23 states and 2266 transitions. [2023-08-24 16:55:55,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 203 transitions, 1581 flow [2023-08-24 16:55:55,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 203 transitions, 1499 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-24 16:55:55,164 INFO L231 Difference]: Finished difference. Result has 81 places, 66 transitions, 617 flow [2023-08-24 16:55:55,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=617, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2023-08-24 16:55:55,166 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 60 predicate places. [2023-08-24 16:55:55,166 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 617 flow [2023-08-24 16:55:55,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 93.66666666666667) internal successors, (1686), 18 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:55:55,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:55:55,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:55:55,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 16:55:55,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:55:55,373 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:55:55,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:55:55,373 INFO L85 PathProgramCache]: Analyzing trace with hash 373667530, now seen corresponding path program 1 times [2023-08-24 16:55:55,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:55:55,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500153871] [2023-08-24 16:55:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:55:55,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:55:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:55:55,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:55:55,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:55:55,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500153871] [2023-08-24 16:55:55,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500153871] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:55:55,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20777698] [2023-08-24 16:55:55,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:55:55,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:55:55,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:55:55,640 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:55:55,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 16:55:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:55:55,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-24 16:55:55,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:55:55,791 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 16:55:55,855 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 16:55:55,931 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 16:55:56,313 INFO L322 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2023-08-24 16:55:56,313 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 343 treesize of output 320 [2023-08-24 16:55:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:55:56,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:56:18,801 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:56:18,801 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 464 treesize of output 272 [2023-08-24 16:56:18,878 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:56:18,879 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 1536 treesize of output 1392 [2023-08-24 16:56:19,003 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:56:19,003 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 250 treesize of output 276 [2023-08-24 16:56:23,133 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:56:23,133 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 345 treesize of output 269 [2023-08-24 16:56:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:56:24,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20777698] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:56:24,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:56:24,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-24 16:56:24,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230886305] [2023-08-24 16:56:24,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:56:24,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 16:56:24,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:56:24,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 16:56:24,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=368, Unknown=2, NotChecked=0, Total=462 [2023-08-24 16:56:24,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 544 [2023-08-24 16:56:24,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 66 transitions, 617 flow. Second operand has 22 states, 22 states have (on average 129.1818181818182) internal successors, (2842), 22 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:56:24,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:56:24,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 544 [2023-08-24 16:56:24,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:56:37,407 WARN L234 SmtUtils]: Spent 8.33s on a formula simplification. DAG size of input: 86 DAG size of output: 81 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:56:54,178 WARN L234 SmtUtils]: Spent 8.27s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:57:12,335 WARN L234 SmtUtils]: Spent 18.05s on a formula simplification. DAG size of input: 157 DAG size of output: 146 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:57:16,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 16:57:25,748 WARN L234 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:57:29,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 16:57:32,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 16:57:35,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 16:57:38,095 INFO L124 PetriNetUnfolderBase]: 520/999 cut-off events. [2023-08-24 16:57:38,095 INFO L125 PetriNetUnfolderBase]: For 4685/4685 co-relation queries the response was YES. [2023-08-24 16:57:38,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4644 conditions, 999 events. 520/999 cut-off events. For 4685/4685 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5371 event pairs, 25 based on Foata normal form. 17/1014 useless extension candidates. Maximal degree in co-relation 4493. Up to 289 conditions per place. [2023-08-24 16:57:38,104 INFO L140 encePairwiseOnDemand]: 533/544 looper letters, 141 selfloop transitions, 93 changer transitions 55/289 dead transitions. [2023-08-24 16:57:38,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 289 transitions, 2527 flow [2023-08-24 16:57:38,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 16:57:38,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 16:57:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 5330 transitions. [2023-08-24 16:57:38,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24494485294117646 [2023-08-24 16:57:38,120 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 5330 transitions. [2023-08-24 16:57:38,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 5330 transitions. [2023-08-24 16:57:38,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:57:38,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 5330 transitions. [2023-08-24 16:57:38,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 133.25) internal successors, (5330), 40 states have internal predecessors, (5330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:57:38,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 544.0) internal successors, (22304), 41 states have internal predecessors, (22304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:57:38,172 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 544.0) internal successors, (22304), 41 states have internal predecessors, (22304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:57:38,172 INFO L175 Difference]: Start difference. First operand has 81 places, 66 transitions, 617 flow. Second operand 40 states and 5330 transitions. [2023-08-24 16:57:38,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 289 transitions, 2527 flow [2023-08-24 16:57:38,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 289 transitions, 2211 flow, removed 157 selfloop flow, removed 8 redundant places. [2023-08-24 16:57:38,196 INFO L231 Difference]: Finished difference. Result has 126 places, 125 transitions, 1424 flow [2023-08-24 16:57:38,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1424, PETRI_PLACES=126, PETRI_TRANSITIONS=125} [2023-08-24 16:57:38,197 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 105 predicate places. [2023-08-24 16:57:38,197 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 125 transitions, 1424 flow [2023-08-24 16:57:38,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 129.1818181818182) internal successors, (2842), 22 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:57:38,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:57:38,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:57:38,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 16:57:38,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-08-24 16:57:38,404 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:57:38,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:57:38,405 INFO L85 PathProgramCache]: Analyzing trace with hash 321377432, now seen corresponding path program 2 times [2023-08-24 16:57:38,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:57:38,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682032787] [2023-08-24 16:57:38,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:57:38,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:57:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:57:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:57:38,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:57:38,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682032787] [2023-08-24 16:57:38,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682032787] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:57:38,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270063889] [2023-08-24 16:57:38,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:57:38,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:57:38,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:57:38,641 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:57:38,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 16:57:38,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:57:38,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:57:38,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 16:57:38,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:57:39,125 INFO L322 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2023-08-24 16:57:39,125 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 343 treesize of output 320 [2023-08-24 16:57:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:57:39,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:58:16,444 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-08-24 16:58:16,554 INFO L322 Elim1Store]: treesize reduction 5, result has 95.2 percent of original size [2023-08-24 16:58:16,555 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 158 treesize of output 145 [2023-08-24 16:58:16,853 INFO L322 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2023-08-24 16:58:16,853 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 1 [2023-08-24 16:58:16,869 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 16:58:16,869 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-08-24 16:58:16,887 INFO L322 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2023-08-24 16:58:16,888 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 1 [2023-08-24 16:58:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:58:17,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270063889] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:58:17,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:58:17,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-24 16:58:17,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792650592] [2023-08-24 16:58:17,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:58:17,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 16:58:17,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:58:17,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 16:58:17,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2023-08-24 16:58:17,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 544 [2023-08-24 16:58:17,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 125 transitions, 1424 flow. Second operand has 18 states, 18 states have (on average 136.66666666666666) internal successors, (2460), 18 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:58:17,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:58:17,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 544 [2023-08-24 16:58:17,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:58:18,645 INFO L124 PetriNetUnfolderBase]: 476/905 cut-off events. [2023-08-24 16:58:18,645 INFO L125 PetriNetUnfolderBase]: For 6242/6242 co-relation queries the response was YES. [2023-08-24 16:58:18,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5096 conditions, 905 events. 476/905 cut-off events. For 6242/6242 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4632 event pairs, 114 based on Foata normal form. 9/913 useless extension candidates. Maximal degree in co-relation 4953. Up to 675 conditions per place. [2023-08-24 16:58:18,653 INFO L140 encePairwiseOnDemand]: 534/544 looper letters, 110 selfloop transitions, 50 changer transitions 9/169 dead transitions. [2023-08-24 16:58:18,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 169 transitions, 1955 flow [2023-08-24 16:58:18,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 16:58:18,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 16:58:18,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2370 transitions. [2023-08-24 16:58:18,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2562716262975779 [2023-08-24 16:58:18,659 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2370 transitions. [2023-08-24 16:58:18,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2370 transitions. [2023-08-24 16:58:18,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:58:18,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2370 transitions. [2023-08-24 16:58:18,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 139.41176470588235) internal successors, (2370), 17 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:58:18,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 544.0) internal successors, (9792), 18 states have internal predecessors, (9792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:58:18,678 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 544.0) internal successors, (9792), 18 states have internal predecessors, (9792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:58:18,679 INFO L175 Difference]: Start difference. First operand has 126 places, 125 transitions, 1424 flow. Second operand 17 states and 2370 transitions. [2023-08-24 16:58:18,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 169 transitions, 1955 flow [2023-08-24 16:58:18,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 169 transitions, 1721 flow, removed 108 selfloop flow, removed 10 redundant places. [2023-08-24 16:58:18,706 INFO L231 Difference]: Finished difference. Result has 128 places, 127 transitions, 1353 flow [2023-08-24 16:58:18,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=1194, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1353, PETRI_PLACES=128, PETRI_TRANSITIONS=127} [2023-08-24 16:58:18,707 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 107 predicate places. [2023-08-24 16:58:18,707 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 127 transitions, 1353 flow [2023-08-24 16:58:18,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 136.66666666666666) internal successors, (2460), 18 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:58:18,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:58:18,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:58:18,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 16:58:18,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:58:18,913 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 16:58:18,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:58:18,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1954420070, now seen corresponding path program 3 times [2023-08-24 16:58:18,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:58:18,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560346414] [2023-08-24 16:58:18,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:58:18,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:58:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:58:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:58:19,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:58:19,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560346414] [2023-08-24 16:58:19,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560346414] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:58:19,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144022433] [2023-08-24 16:58:19,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:58:19,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:58:19,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:58:19,171 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:58:19,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 16:58:19,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 16:58:19,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:58:19,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-24 16:58:19,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:58:19,366 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 16:58:19,409 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 16:58:19,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 16:58:19,517 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 16:58:19,774 INFO L322 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2023-08-24 16:58:19,774 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 343 treesize of output 320 [2023-08-24 16:58:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:58:20,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:58:44,818 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:58:44,819 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 461 treesize of output 269 [2023-08-24 16:58:44,878 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:58:44,879 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 916 treesize of output 852 [2023-08-24 16:58:44,945 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:58:44,946 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 588 treesize of output 480 [2023-08-24 16:58:45,043 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 16:58:45,044 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 249 treesize of output 269 [2023-08-24 16:58:52,859 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 16:58:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:58:52,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144022433] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:58:52,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:58:52,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 22 [2023-08-24 16:58:52,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66689248] [2023-08-24 16:58:52,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:58:52,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 16:58:52,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:58:52,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 16:58:52,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=385, Unknown=2, NotChecked=0, Total=462 [2023-08-24 16:58:52,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 544 [2023-08-24 16:58:52,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 127 transitions, 1353 flow. Second operand has 22 states, 22 states have (on average 129.1818181818182) internal successors, (2842), 22 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:58:52,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:58:52,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 544 [2023-08-24 16:58:52,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:59:04,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 16:59:17,644 WARN L234 SmtUtils]: Spent 12.55s on a formula simplification. DAG size of input: 135 DAG size of output: 127 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 16:59:23,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 16:59:30,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 16:59:53,270 WARN L234 SmtUtils]: Spent 18.62s on a formula simplification. DAG size of input: 154 DAG size of output: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 17:00:02,355 WARN L234 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 121 DAG size of output: 89 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 17:00:05,191 INFO L124 PetriNetUnfolderBase]: 577/1102 cut-off events. [2023-08-24 17:00:05,192 INFO L125 PetriNetUnfolderBase]: For 5475/5475 co-relation queries the response was YES. [2023-08-24 17:00:05,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5637 conditions, 1102 events. 577/1102 cut-off events. For 5475/5475 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5989 event pairs, 90 based on Foata normal form. 12/1113 useless extension candidates. Maximal degree in co-relation 5490. Up to 343 conditions per place. [2023-08-24 17:00:05,198 INFO L140 encePairwiseOnDemand]: 533/544 looper letters, 106 selfloop transitions, 79 changer transitions 71/256 dead transitions. [2023-08-24 17:00:05,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 256 transitions, 2556 flow [2023-08-24 17:00:05,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 17:00:05,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 17:00:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4127 transitions. [2023-08-24 17:00:05,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24472248576850095 [2023-08-24 17:00:05,207 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4127 transitions. [2023-08-24 17:00:05,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4127 transitions. [2023-08-24 17:00:05,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 17:00:05,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4127 transitions. [2023-08-24 17:00:05,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 133.1290322580645) internal successors, (4127), 31 states have internal predecessors, (4127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:00:05,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 544.0) internal successors, (17408), 32 states have internal predecessors, (17408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:00:05,225 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 544.0) internal successors, (17408), 32 states have internal predecessors, (17408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:00:05,225 INFO L175 Difference]: Start difference. First operand has 128 places, 127 transitions, 1353 flow. Second operand 31 states and 4127 transitions. [2023-08-24 17:00:05,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 256 transitions, 2556 flow [2023-08-24 17:00:05,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 256 transitions, 2450 flow, removed 12 selfloop flow, removed 13 redundant places. [2023-08-24 17:00:05,255 INFO L231 Difference]: Finished difference. Result has 149 places, 108 transitions, 1298 flow [2023-08-24 17:00:05,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1298, PETRI_PLACES=149, PETRI_TRANSITIONS=108} [2023-08-24 17:00:05,255 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 128 predicate places. [2023-08-24 17:00:05,256 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 108 transitions, 1298 flow [2023-08-24 17:00:05,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 129.1818181818182) internal successors, (2842), 22 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:00:05,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 17:00:05,257 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 17:00:05,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 17:00:05,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 17:00:05,462 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 17:00:05,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 17:00:05,463 INFO L85 PathProgramCache]: Analyzing trace with hash 809271084, now seen corresponding path program 2 times [2023-08-24 17:00:05,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 17:00:05,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53548266] [2023-08-24 17:00:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 17:00:05,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 17:00:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 17:00:05,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 17:00:05,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 17:00:05,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53548266] [2023-08-24 17:00:05,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53548266] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 17:00:05,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48919470] [2023-08-24 17:00:05,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 17:00:05,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 17:00:05,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 17:00:05,788 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 17:00:05,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 17:00:05,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 17:00:05,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 17:00:05,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 17:00:05,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 17:00:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 17:00:06,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 17:00:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 17:00:06,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48919470] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 17:00:06,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 17:00:06,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-24 17:00:06,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35553682] [2023-08-24 17:00:06,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 17:00:06,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 17:00:06,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 17:00:06,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 17:00:06,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-08-24 17:00:06,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 544 [2023-08-24 17:00:06,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 108 transitions, 1298 flow. Second operand has 11 states, 11 states have (on average 195.27272727272728) internal successors, (2148), 11 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:00:06,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 17:00:06,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 544 [2023-08-24 17:00:06,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 17:00:07,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 17:00:08,784 INFO L124 PetriNetUnfolderBase]: 326/649 cut-off events. [2023-08-24 17:00:08,784 INFO L125 PetriNetUnfolderBase]: For 3989/3989 co-relation queries the response was YES. [2023-08-24 17:00:08,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3614 conditions, 649 events. 326/649 cut-off events. For 3989/3989 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3158 event pairs, 40 based on Foata normal form. 12/660 useless extension candidates. Maximal degree in co-relation 3565. Up to 207 conditions per place. [2023-08-24 17:00:08,789 INFO L140 encePairwiseOnDemand]: 538/544 looper letters, 100 selfloop transitions, 70 changer transitions 0/170 dead transitions. [2023-08-24 17:00:08,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 170 transitions, 1995 flow [2023-08-24 17:00:08,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 17:00:08,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 17:00:08,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3183 transitions. [2023-08-24 17:00:08,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36569393382352944 [2023-08-24 17:00:08,792 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3183 transitions. [2023-08-24 17:00:08,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3183 transitions. [2023-08-24 17:00:08,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 17:00:08,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3183 transitions. [2023-08-24 17:00:08,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 198.9375) internal successors, (3183), 16 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:00:08,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 544.0) internal successors, (9248), 17 states have internal predecessors, (9248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:00:08,803 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 544.0) internal successors, (9248), 17 states have internal predecessors, (9248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:00:08,803 INFO L175 Difference]: Start difference. First operand has 149 places, 108 transitions, 1298 flow. Second operand 16 states and 3183 transitions. [2023-08-24 17:00:08,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 170 transitions, 1995 flow [2023-08-24 17:00:08,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 170 transitions, 1762 flow, removed 54 selfloop flow, removed 29 redundant places. [2023-08-24 17:00:08,828 INFO L231 Difference]: Finished difference. Result has 121 places, 115 transitions, 1339 flow [2023-08-24 17:00:08,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=1104, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1339, PETRI_PLACES=121, PETRI_TRANSITIONS=115} [2023-08-24 17:00:08,829 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 100 predicate places. [2023-08-24 17:00:08,829 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 115 transitions, 1339 flow [2023-08-24 17:00:08,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 195.27272727272728) internal successors, (2148), 11 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:00:08,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 17:00:08,830 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 17:00:08,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 17:00:09,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-24 17:00:09,036 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 17:00:09,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 17:00:09,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1269040194, now seen corresponding path program 3 times [2023-08-24 17:00:09,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 17:00:09,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410855628] [2023-08-24 17:00:09,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 17:00:09,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 17:00:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 17:00:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 17:00:09,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 17:00:09,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410855628] [2023-08-24 17:00:09,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410855628] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 17:00:09,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273923117] [2023-08-24 17:00:09,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 17:00:09,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 17:00:09,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 17:00:09,225 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 17:00:09,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 17:00:09,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 17:00:09,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 17:00:09,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 17:00:09,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 17:00:09,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 17:00:09,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 17:00:09,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 17:00:09,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273923117] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 17:00:09,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 17:00:09,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 17:00:09,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858851708] [2023-08-24 17:00:09,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 17:00:09,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 17:00:09,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 17:00:09,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 17:00:09,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-24 17:00:09,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 544 [2023-08-24 17:00:09,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 115 transitions, 1339 flow. Second operand has 12 states, 12 states have (on average 195.33333333333334) internal successors, (2344), 12 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:00:09,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 17:00:09,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 544 [2023-08-24 17:00:09,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 17:00:11,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 17:00:14,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 17:00:15,334 INFO L124 PetriNetUnfolderBase]: 372/737 cut-off events. [2023-08-24 17:00:15,335 INFO L125 PetriNetUnfolderBase]: For 3990/3990 co-relation queries the response was YES. [2023-08-24 17:00:15,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4024 conditions, 737 events. 372/737 cut-off events. For 3990/3990 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3721 event pairs, 40 based on Foata normal form. 20/756 useless extension candidates. Maximal degree in co-relation 3983. Up to 253 conditions per place. [2023-08-24 17:00:15,341 INFO L140 encePairwiseOnDemand]: 538/544 looper letters, 111 selfloop transitions, 88 changer transitions 0/199 dead transitions. [2023-08-24 17:00:15,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 199 transitions, 2225 flow [2023-08-24 17:00:15,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 17:00:15,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 17:00:15,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3400 transitions. [2023-08-24 17:00:15,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36764705882352944 [2023-08-24 17:00:15,345 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3400 transitions. [2023-08-24 17:00:15,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3400 transitions. [2023-08-24 17:00:15,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 17:00:15,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3400 transitions. [2023-08-24 17:00:15,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 200.0) internal successors, (3400), 17 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:00:15,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 544.0) internal successors, (9792), 18 states have internal predecessors, (9792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:00:15,357 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 544.0) internal successors, (9792), 18 states have internal predecessors, (9792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:00:15,357 INFO L175 Difference]: Start difference. First operand has 121 places, 115 transitions, 1339 flow. Second operand 17 states and 3400 transitions. [2023-08-24 17:00:15,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 199 transitions, 2225 flow [2023-08-24 17:00:15,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 199 transitions, 2061 flow, removed 34 selfloop flow, removed 8 redundant places. [2023-08-24 17:00:15,378 INFO L231 Difference]: Finished difference. Result has 134 places, 136 transitions, 1685 flow [2023-08-24 17:00:15,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1685, PETRI_PLACES=134, PETRI_TRANSITIONS=136} [2023-08-24 17:00:15,379 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 113 predicate places. [2023-08-24 17:00:15,379 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 136 transitions, 1685 flow [2023-08-24 17:00:15,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.33333333333334) internal successors, (2344), 12 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:00:15,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 17:00:15,380 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 17:00:15,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 17:00:15,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 17:00:15,586 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 17:00:15,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 17:00:15,586 INFO L85 PathProgramCache]: Analyzing trace with hash -944183851, now seen corresponding path program 4 times [2023-08-24 17:00:15,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 17:00:15,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220347804] [2023-08-24 17:00:15,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 17:00:15,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 17:00:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 17:00:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 17:00:15,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 17:00:15,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220347804] [2023-08-24 17:00:15,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220347804] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 17:00:15,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402119204] [2023-08-24 17:00:15,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 17:00:15,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 17:00:15,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 17:00:15,900 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 17:00:15,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 17:00:16,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 17:00:16,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 17:00:16,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 17:00:16,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 17:00:16,079 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 17:00:16,128 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 17:00:16,168 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 17:00:16,737 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 17:00:16,755 INFO L322 Elim1Store]: treesize reduction 72, result has 12.2 percent of original size [2023-08-24 17:00:16,755 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 43 [2023-08-24 17:00:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 17:00:16,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 17:00:47,584 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 17:00:47,584 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 548 treesize of output 320 [2023-08-24 17:00:47,668 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 17:00:47,668 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 890 treesize of output 914 [2023-08-24 17:00:47,809 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 17:00:47,810 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 730 treesize of output 674 [2023-08-24 17:00:48,014 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 17:00:48,014 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 301 treesize of output 365 [2023-08-24 17:01:05,736 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 17:01:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 17:01:06,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402119204] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 17:01:06,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 17:01:06,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-08-24 17:01:06,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252043014] [2023-08-24 17:01:06,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 17:01:06,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 17:01:06,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 17:01:06,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 17:01:06,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=476, Unknown=2, NotChecked=0, Total=600 [2023-08-24 17:01:06,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 544 [2023-08-24 17:01:06,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 136 transitions, 1685 flow. Second operand has 25 states, 25 states have (on average 129.04) internal successors, (3226), 25 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:01:06,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 17:01:06,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 544 [2023-08-24 17:01:06,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 17:01:18,548 WARN L234 SmtUtils]: Spent 12.23s on a formula simplification. DAG size of input: 75 DAG size of output: 68 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 17:01:26,985 WARN L234 SmtUtils]: Spent 8.23s on a formula simplification. DAG size of input: 77 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 17:01:37,686 WARN L234 SmtUtils]: Spent 10.31s on a formula simplification. DAG size of input: 84 DAG size of output: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 17:01:40,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 17:01:47,702 WARN L234 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 210 DAG size of output: 204 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 17:01:51,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 17:01:53,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 17:01:55,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 17:01:58,754 INFO L124 PetriNetUnfolderBase]: 488/969 cut-off events. [2023-08-24 17:01:58,754 INFO L125 PetriNetUnfolderBase]: For 5936/5936 co-relation queries the response was YES. [2023-08-24 17:01:58,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5537 conditions, 969 events. 488/969 cut-off events. For 5936/5936 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5270 event pairs, 9 based on Foata normal form. 14/981 useless extension candidates. Maximal degree in co-relation 5493. Up to 406 conditions per place. [2023-08-24 17:01:58,762 INFO L140 encePairwiseOnDemand]: 533/544 looper letters, 135 selfloop transitions, 131 changer transitions 23/289 dead transitions. [2023-08-24 17:01:58,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 289 transitions, 3319 flow [2023-08-24 17:01:58,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 17:01:58,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 17:01:58,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 5788 transitions. [2023-08-24 17:01:58,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24181149732620322 [2023-08-24 17:01:58,770 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 5788 transitions. [2023-08-24 17:01:58,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 5788 transitions. [2023-08-24 17:01:58,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 17:01:58,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 5788 transitions. [2023-08-24 17:01:58,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 131.54545454545453) internal successors, (5788), 44 states have internal predecessors, (5788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:01:58,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 544.0) internal successors, (24480), 45 states have internal predecessors, (24480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:01:58,793 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 544.0) internal successors, (24480), 45 states have internal predecessors, (24480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:01:58,794 INFO L175 Difference]: Start difference. First operand has 134 places, 136 transitions, 1685 flow. Second operand 44 states and 5788 transitions. [2023-08-24 17:01:58,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 289 transitions, 3319 flow [2023-08-24 17:01:58,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 289 transitions, 3073 flow, removed 64 selfloop flow, removed 7 redundant places. [2023-08-24 17:01:58,829 INFO L231 Difference]: Finished difference. Result has 180 places, 189 transitions, 2515 flow [2023-08-24 17:01:58,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=1492, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=2515, PETRI_PLACES=180, PETRI_TRANSITIONS=189} [2023-08-24 17:01:58,829 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 159 predicate places. [2023-08-24 17:01:58,829 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 189 transitions, 2515 flow [2023-08-24 17:01:58,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 129.04) internal successors, (3226), 25 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:01:58,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 17:01:58,830 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 17:01:58,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 17:01:59,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 17:01:59,036 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 17:01:59,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 17:01:59,036 INFO L85 PathProgramCache]: Analyzing trace with hash -935165372, now seen corresponding path program 4 times [2023-08-24 17:01:59,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 17:01:59,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482355210] [2023-08-24 17:01:59,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 17:01:59,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 17:01:59,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 17:01:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 17:01:59,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 17:01:59,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482355210] [2023-08-24 17:01:59,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482355210] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 17:01:59,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392818778] [2023-08-24 17:01:59,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 17:01:59,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 17:01:59,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 17:01:59,291 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 17:01:59,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 17:01:59,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 17:01:59,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 17:01:59,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 17:01:59,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 17:01:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 17:01:59,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 17:01:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 17:01:59,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392818778] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 17:01:59,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 17:01:59,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 17:01:59,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766251078] [2023-08-24 17:01:59,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 17:01:59,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 17:01:59,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 17:01:59,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 17:01:59,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-24 17:01:59,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 544 [2023-08-24 17:01:59,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 189 transitions, 2515 flow. Second operand has 12 states, 12 states have (on average 195.33333333333334) internal successors, (2344), 12 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:01:59,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 17:01:59,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 544 [2023-08-24 17:01:59,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 17:02:01,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 17:02:03,866 INFO L124 PetriNetUnfolderBase]: 547/1098 cut-off events. [2023-08-24 17:02:03,866 INFO L125 PetriNetUnfolderBase]: For 8705/8705 co-relation queries the response was YES. [2023-08-24 17:02:03,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6702 conditions, 1098 events. 547/1098 cut-off events. For 8705/8705 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6230 event pairs, 77 based on Foata normal form. 24/1121 useless extension candidates. Maximal degree in co-relation 6650. Up to 347 conditions per place. [2023-08-24 17:02:03,878 INFO L140 encePairwiseOnDemand]: 538/544 looper letters, 170 selfloop transitions, 124 changer transitions 0/294 dead transitions. [2023-08-24 17:02:03,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 294 transitions, 3889 flow [2023-08-24 17:02:03,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 17:02:03,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 17:02:03,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3999 transitions. [2023-08-24 17:02:03,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36755514705882353 [2023-08-24 17:02:03,883 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3999 transitions. [2023-08-24 17:02:03,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3999 transitions. [2023-08-24 17:02:03,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 17:02:03,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3999 transitions. [2023-08-24 17:02:03,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 199.95) internal successors, (3999), 20 states have internal predecessors, (3999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:02:03,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 544.0) internal successors, (11424), 21 states have internal predecessors, (11424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:02:03,895 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 544.0) internal successors, (11424), 21 states have internal predecessors, (11424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:02:03,895 INFO L175 Difference]: Start difference. First operand has 180 places, 189 transitions, 2515 flow. Second operand 20 states and 3999 transitions. [2023-08-24 17:02:03,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 294 transitions, 3889 flow [2023-08-24 17:02:03,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 294 transitions, 3519 flow, removed 115 selfloop flow, removed 21 redundant places. [2023-08-24 17:02:03,946 INFO L231 Difference]: Finished difference. Result has 178 places, 216 transitions, 2984 flow [2023-08-24 17:02:03,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=2224, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2984, PETRI_PLACES=178, PETRI_TRANSITIONS=216} [2023-08-24 17:02:03,946 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 157 predicate places. [2023-08-24 17:02:03,946 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 216 transitions, 2984 flow [2023-08-24 17:02:03,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 195.33333333333334) internal successors, (2344), 12 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:02:03,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 17:02:03,947 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 17:02:03,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 17:02:04,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 17:02:04,153 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 17:02:04,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 17:02:04,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1386637068, now seen corresponding path program 5 times [2023-08-24 17:02:04,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 17:02:04,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860558866] [2023-08-24 17:02:04,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 17:02:04,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 17:02:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 17:02:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 17:02:04,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 17:02:04,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860558866] [2023-08-24 17:02:04,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860558866] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 17:02:04,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469391628] [2023-08-24 17:02:04,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 17:02:04,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 17:02:04,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 17:02:04,541 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 17:02:04,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 17:02:04,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 17:02:04,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 17:02:04,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 17:02:04,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 17:02:04,830 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2023-08-24 17:02:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 17:02:04,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 17:02:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 17:02:05,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469391628] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 17:02:05,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 17:02:05,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-24 17:02:05,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186499166] [2023-08-24 17:02:05,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 17:02:05,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 17:02:05,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 17:02:05,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 17:02:05,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-08-24 17:02:05,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 544 [2023-08-24 17:02:05,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 216 transitions, 2984 flow. Second operand has 11 states, 11 states have (on average 195.36363636363637) internal successors, (2149), 11 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:02:05,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 17:02:05,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 544 [2023-08-24 17:02:05,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 17:02:07,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 17:02:09,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 17:02:11,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 17:02:12,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 17:02:13,255 INFO L124 PetriNetUnfolderBase]: 542/1063 cut-off events. [2023-08-24 17:02:13,255 INFO L125 PetriNetUnfolderBase]: For 7803/7803 co-relation queries the response was YES. [2023-08-24 17:02:13,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6676 conditions, 1063 events. 542/1063 cut-off events. For 7803/7803 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5887 event pairs, 68 based on Foata normal form. 10/1072 useless extension candidates. Maximal degree in co-relation 6623. Up to 323 conditions per place. [2023-08-24 17:02:13,267 INFO L140 encePairwiseOnDemand]: 538/544 looper letters, 153 selfloop transitions, 115 changer transitions 0/268 dead transitions. [2023-08-24 17:02:13,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 268 transitions, 3728 flow [2023-08-24 17:02:13,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 17:02:13,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 17:02:13,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3200 transitions. [2023-08-24 17:02:13,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36764705882352944 [2023-08-24 17:02:13,271 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3200 transitions. [2023-08-24 17:02:13,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3200 transitions. [2023-08-24 17:02:13,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 17:02:13,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3200 transitions. [2023-08-24 17:02:13,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 200.0) internal successors, (3200), 16 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:02:13,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 544.0) internal successors, (9248), 17 states have internal predecessors, (9248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:02:13,281 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 544.0) internal successors, (9248), 17 states have internal predecessors, (9248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:02:13,281 INFO L175 Difference]: Start difference. First operand has 178 places, 216 transitions, 2984 flow. Second operand 16 states and 3200 transitions. [2023-08-24 17:02:13,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 268 transitions, 3728 flow [2023-08-24 17:02:13,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 268 transitions, 3535 flow, removed 54 selfloop flow, removed 7 redundant places. [2023-08-24 17:02:13,330 INFO L231 Difference]: Finished difference. Result has 187 places, 216 transitions, 3042 flow [2023-08-24 17:02:13,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=544, PETRI_DIFFERENCE_MINUEND_FLOW=2719, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3042, PETRI_PLACES=187, PETRI_TRANSITIONS=216} [2023-08-24 17:02:13,332 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 166 predicate places. [2023-08-24 17:02:13,332 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 216 transitions, 3042 flow [2023-08-24 17:02:13,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 195.36363636363637) internal successors, (2149), 11 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:02:13,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 17:02:13,333 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 17:02:13,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 17:02:13,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 17:02:13,540 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 17:02:13,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 17:02:13,541 INFO L85 PathProgramCache]: Analyzing trace with hash -978928776, now seen corresponding path program 5 times [2023-08-24 17:02:13,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 17:02:13,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433744712] [2023-08-24 17:02:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 17:02:13,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 17:02:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 17:02:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 17:02:13,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 17:02:13,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433744712] [2023-08-24 17:02:13,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433744712] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 17:02:13,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140207708] [2023-08-24 17:02:13,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 17:02:13,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 17:02:13,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 17:02:13,729 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 17:02:13,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 17:02:13,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 17:02:13,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 17:02:13,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-24 17:02:13,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 17:02:14,011 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 17:02:14,047 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 17:02:14,078 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 17:02:14,118 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 17:02:14,424 INFO L322 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2023-08-24 17:02:14,424 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 339 treesize of output 313 [2023-08-24 17:02:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 17:02:14,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 17:03:44,908 WARN L234 SmtUtils]: Spent 25.46s on a formula simplification. DAG size of input: 225 DAG size of output: 214 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 17:03:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 17:03:45,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140207708] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 17:03:45,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 17:03:45,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 20 [2023-08-24 17:03:45,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935349977] [2023-08-24 17:03:45,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 17:03:45,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 17:03:45,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 17:03:45,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 17:03:45,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2023-08-24 17:03:45,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 544 [2023-08-24 17:03:45,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 216 transitions, 3042 flow. Second operand has 20 states, 20 states have (on average 128.95) internal successors, (2579), 20 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 17:03:45,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 17:03:45,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 544 [2023-08-24 17:03:45,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 17:03:49,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 17:05:39,489 WARN L234 SmtUtils]: Spent 1.79m on a formula simplification. DAG size of input: 298 DAG size of output: 256 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 17:05:59,475 WARN L234 SmtUtils]: Spent 13.73s on a formula simplification. DAG size of input: 226 DAG size of output: 187 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 17:06:01,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 17:06:05,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] Received shutdown request... [2023-08-24 17:08:39,416 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 17:08:39,417 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 17:08:39,917 WARN L266 SmtUtils]: Removed 9 from assertion stack [2023-08-24 17:08:39,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 17:08:39,919 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 17:08:39,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-24 17:08:40,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 17:08:40,119 WARN L619 AbstractCegarLoop]: Verification canceled: while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 298 for 151726ms.. [2023-08-24 17:08:40,121 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 17:08:40,121 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 17:08:40,121 INFO L445 BasicCegarLoop]: Path program histogram: [6, 5, 5, 1] [2023-08-24 17:08:40,124 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 17:08:40,124 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 17:08:40,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 05:08:40 BasicIcfg [2023-08-24 17:08:40,126 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 17:08:40,126 INFO L158 Benchmark]: Toolchain (without parser) took 843626.81ms. Allocated memory was 385.9MB in the beginning and 474.0MB in the end (delta: 88.1MB). Free memory was 362.2MB in the beginning and 296.4MB in the end (delta: 65.8MB). Peak memory consumption was 156.3MB. Max. memory is 16.0GB. [2023-08-24 17:08:40,127 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 385.9MB. Free memory is still 362.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 17:08:40,127 INFO L158 Benchmark]: CACSL2BoogieTranslator took 276.22ms. Allocated memory is still 385.9MB. Free memory was 361.6MB in the beginning and 349.9MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 17:08:40,127 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.75ms. Allocated memory is still 385.9MB. Free memory was 349.9MB in the beginning and 347.2MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 17:08:40,127 INFO L158 Benchmark]: Boogie Preprocessor took 49.62ms. Allocated memory is still 385.9MB. Free memory was 347.2MB in the beginning and 345.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 17:08:40,127 INFO L158 Benchmark]: RCFGBuilder took 481.05ms. Allocated memory is still 385.9MB. Free memory was 345.7MB in the beginning and 324.7MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-24 17:08:40,128 INFO L158 Benchmark]: TraceAbstraction took 842751.51ms. Allocated memory was 385.9MB in the beginning and 474.0MB in the end (delta: 88.1MB). Free memory was 324.2MB in the beginning and 296.4MB in the end (delta: 27.8MB). Peak memory consumption was 118.5MB. Max. memory is 16.0GB. [2023-08-24 17:08:40,129 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 385.9MB. Free memory is still 362.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 276.22ms. Allocated memory is still 385.9MB. Free memory was 361.6MB in the beginning and 349.9MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 63.75ms. Allocated memory is still 385.9MB. Free memory was 349.9MB in the beginning and 347.2MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 49.62ms. Allocated memory is still 385.9MB. Free memory was 347.2MB in the beginning and 345.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 481.05ms. Allocated memory is still 385.9MB. Free memory was 345.7MB in the beginning and 324.7MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 842751.51ms. Allocated memory was 385.9MB in the beginning and 474.0MB in the end (delta: 88.1MB). Free memory was 324.2MB in the beginning and 296.4MB in the end (delta: 27.8MB). Peak memory consumption was 118.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 23.2s, 224 PlacesBefore, 21 PlacesAfterwards, 241 TransitionsBefore, 17 TransitionsAfterwards, 6892 CoEnabledTransitionPairs, 8 FixpointIterations, 66 TrivialSequentialCompositions, 139 ConcurrentSequentialCompositions, 15 TrivialYvCompositions, 52 ConcurrentYvCompositions, 21 ChoiceCompositions, 293 TotalNumberOfCompositions, 6480 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6386, independent: 6375, independent conditional: 0, independent unconditional: 6375, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4073, independent: 4067, independent conditional: 0, independent unconditional: 4067, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6386, independent: 2308, independent conditional: 0, independent unconditional: 2308, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 4073, unknown conditional: 0, unknown unconditional: 4073] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 20, Positive conditional cache size: 0, Positive unconditional cache size: 20, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 115]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 298 for 151726ms.. - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 298 for 151726ms.. - TimeoutResultAtElement [Line: 109]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 298 for 151726ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 364 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 842.5s, OverallIterations: 17, TraceHistogramMax: 2, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 535.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 23.4s, HoareTripleCheckerStatistics: 70 mSolverCounterUnknown, 1328 SdHoareTripleChecker+Valid, 79.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1328 mSDsluCounter, 358 SdHoareTripleChecker+Invalid, 78.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 294 mSDsCounter, 285 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5400 IncrementalHoareTripleChecker+Invalid, 5755 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 285 mSolverCounterUnsat, 64 mSDtfsCounter, 5400 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 653 GetRequests, 320 SyntacticMatches, 3 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 340.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3042occurred in iteration=16, InterpolantAutomatonStates: 257, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 278.5s InterpolantComputationTime, 436 NumberOfCodeBlocks, 436 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 565 ConstructedInterpolants, 16 QuantifiedInterpolants, 20011 SizeOfPredicates, 262 NumberOfNonLiveVariables, 1715 ConjunctsInSsa, 307 ConjunctsInUnsatCore, 37 InterpolantComputations, 7 PerfectInterpolantSequences, 54/102 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown